Bill Guyton is Professor Emeritus of Geosciences at California State University at Chico. He has hiked, backpacked, fished, and climbed in the High Sierra for over 45 years.

"I heartily recommend this book to anyone as an introduction to glaciers and glaciation in California. It presents a concise yet broad treatment of the topic in a clear, engaging style that builds a foundation of knowledge for reading more advanced literature. The advanced reader will be hard pressed to find a better organized synthesis of this material and should benefit from the historical context it provides and its numerous citations to other literature. Anyone should find the book a pleasure to read."--L. Allan James, "Geotimes